Year	kWh
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	3000000
1979	6000000
1980	11000000
1981	11000000
1982	19000000
1983	60000000
1984	66000000
1985	87000000
1986	177000000
1987	235000000
1988	372000000
1989	554000000
1990	797000000
1991	1032000000
1992	1324000000
1993	1579000000
1994	1710000000
1995	1821000000
1996	2060000000
1997	2910000000
1998	3898000000
1999	4348000000
2000	5542000000
2001	5818000000
2002	6757000000
2003	8057000000
2004	9498000000
2005	9789000000
2006	9178000000
2007	10277000000
2008	10070000000
2009	10044000000
2010	12408000000
2011	14164000000
2012	14820000000
2013	15955000000
2014	17976000000
2015	18944000000